PIC16C62B-04E/SO - 4MHz 8-bit OTP MCU 28-SOIC | Microchip
MPN: PIC16C62B-04E/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.65 | $2,650.00 |
PIC16C62B-04E/SO Overview
What is an OTP microcontroller? An OTP (One-Time Programmable) MCU is a microcontroller whose program memory can be written exactly once after manufacture using a device programmer; the bit cells are implemented as EPROM-style fuses rather than the floating-gate cells of flash memory. This makes OTP parts cost-optimized for high-volume production where firmware is finalized and code changes are not expected in the field, and they remain popular in automotive and appliance applications where supply continuity matters more than in-system reprogrammability.
Key features of the PIC16C62B include 22 digital I/O pins, three hardware timers (Timer0, Timer1, and Timer2 with PWM), a USART/SCI serial port, a 10-bit successive-approximation ADC with 8 channels, a synchronous serial port (SSP) supporting SPI and I2C master/slave modes, and a watchdog timer with its own on-chip RC oscillator for maximum reliability. The PIC16C core executes single-cycle instructions at 200ns (4MHz clock / 4) and offers 35 single-word instructions, while the brown-out reset and power-on reset blocks protect the system against supply transients.
The architecture is based on a Harvard-class RISC design with separate program and data buses, allowing instruction fetch and operand access in a single clock cycle. The 14-bit instruction word keeps the code density high for 8-bit control tasks, and the OTP EPROM cell is rated for data retention suitable for long-life industrial and automotive products. The wide 2.5V to 6.0V operating range also makes the part tolerant of unregulated supplies commonly seen in 5V and 4V battery-backed systems.
Typical applications include automotive body controllers and instrument clusters, appliance control boards, sensor signal conditioning, low-end motor control loops, and industrial IO modules. The extended temperature grade (-E suffix) specifically targets under-hood automotive and outdoor industrial environments where commercial-grade parts would otherwise fail.
When designing with the PIC16C62B, plan your firmware on a development-friendly part first, then burn the final code into the OTP die only after full validation. Because OTP memory cannot be erased, you must budget for a one-time programming cost per unit and choose a programmer that supports the PIC16C6x family OTP windowless devices.
This page synthesizes current distributor pricing, same-brand drop-in equivalents, cross-brand pin-compatible alternatives, and practical design notes that are not consolidated in any single manufacturer or distributor datasheet.
Drop-in alternatives for PIC16C62B-04E/SO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16C62B-04E/SO (same form factor and footprint) — differing in Program Memory Size, RoHS Status, RAM Size, Communication Interfaces, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62B-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62BT-04E/SO
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →PIC16C62B-04E/SP
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.7 / Unit
View Datasheet →PIC16C62AT-20E/SO
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C62A-04E/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.75 / Unit
View Datasheet →PIC16C622T-04E/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.1 / Unit
View Datasheet →PIC16F72-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62B-04E/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-bit |
| Maximum Clock Frequency | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| RAM Size | 128 x 8 bytes |
| Number of I/O Pins | 22 |
| ADC | 10-bit, 8 channels |
| Timers | 3 (Timer0, Timer1, Timer2 with PWM) |
| Serial Interfaces | USART/SCI, SSP (SPI / I2C master-slave) |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Operating Temperature Range | -40 C to +125 C (Extended grade) |
| Package | 28-pin SOIC (SO), 300-mil, gull-wing |
| Mounting Type | Surface Mount |
| Instruction Set | 35 single-word instructions, 200 ns instruction cycle |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-out Reset / Power-on Reset | Yes |
| RoHS Status | Compliant |
PIC16C62B-04E/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF- — PORTA bit 2 / ADC channel 2 / ADC negative reference |
| Pin 2 | RA3/AN3/VREF+ — PORTA bit 3 / ADC channel 3 / ADC positive reference |
| Pin 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 4 | RA5/AN4/SS — PORTA bit 5 / ADC channel 4 / SSP slave select |
| Pin 5 | RE0/RD/AN5 — PORTE bit 0 / parallel slave port read / ADC channel 5 |
| Pin 6 | RE1/WR/AN6 — PORTE bit 1 / parallel slave port write / ADC channel 6 |
| Pin 7 | RE2/CS/AN7 — PORTE bit 2 / parallel slave port chip select / ADC channel 7 |
| Pin 8 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pin 9 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 PWM output |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / USART async transmit / USART sync clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / USART async receive / USART sync data |
| Pin 19 | VSS — Ground reference (optional second VSS pin) |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 22 | RB1 — PORTB bit 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3/PGM — PORTB bit 3 / low-voltage programming input |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC16C62B-04E/SO is suitable for 7 applications: Automotive Body Controllers, Appliance Control Boards, Industrial Sensor Signal Conditioning, Low-End Motor Control Loops, Battery-Powered Sensor Nodes, Instrument Cluster Drivers, Consumer Remote Controls & IR Emitters.
Automotive Body Controllers
PIC16C62B-04E/SO fits automotive body-control modules because its -40C to +125C extended temperature grade handles under-hood and cabin thermal stress. The 22 digital I/O pins drive relays, MOSFET gates, and switch-scan matrices for door locks, window lifters, seat controllers, and lighting clusters. The 10-bit ADC reads battery voltage (12V/24V bus), thermistors, and current-sense shunts with adequate resolution for diagnostic thresholds. The on-chip USART/SCI interfaces to a CAN or LIN transceiver for body-network connectivity. OTP memory suits high-volume sealed production where firmware is finalized, the PIC16C62B-04E/SO ships pre-burned in production, eliminating field-reprogramming risk.
Recommended
Appliance Control Boards
PIC16C62B-04E/SO serves as the main controller in washing machines, dishwashers, refrigerators, and microwave ovens where firmware is finalized and BOM cost dominates. The three timers support motor PWM, user-input debouncing, and watchdog supervision; the SSP port drives SPI EEPROM or LED-driver chains. The 3.5KB OTP stores the appliance control program and lookup tables for sensor calibration. Brown-out reset and power-on reset handle noisy AC-DC rails typical in white goods. Operating voltage 2.5V to 6.0V tolerates unregulated 5V rails.
Recommended
Industrial Sensor Signal Conditioning
PIC16C62B-04E/SO conditions and digitizes sensor signals in industrial IO modules where extended temperature operation is required. The 8-channel 10-bit ADC multiplexes multiple 4-20mA or 0-10V sensor inputs after external op-amp scaling, providing ~10mV resolution at 5V reference - sufficient for process-control thresholds. The USART/SCI uplinks to a host PLC or industrial gateway. The watchdog timer with on-chip RC oscillator maintains safe operation during transient brownouts. OTP memory secures calibration firmware from unauthorized field updates.
Recommended
Low-End Motor Control Loops
PIC16C62B-04E/SO drives low-end BLDC, stepper, and brushed DC motor control loops where cost is critical. The Capture/Compare/PWM module generates a 10-bit PWM at up to 4MHz tick for switching speeds up to 20kHz, suitable for small fan, pump, and solenoid drivers. The ADC samples back-EMF or current-sense resistors for closed-loop current limiting. The 22 I/O pins control direction, brake, fault, and enable lines plus IGBT/MOSFET gate drivers. Extended temperature grade supports industrial and appliance motor enclosures.
Recommended
Battery-Powered Sensor Nodes
PIC16C62B-04E/SO can serve in battery-powered sensor nodes that run from 3-4 AA cells, leveraging the wide 2.5V to 6.0V supply range. The ADC monitors battery voltage and sensor inputs while the USART transmits readings periodically. The on-chip watchdog and brown-out reset prevent corrupted operation as cells deplete. The PIC16C62B-04E/SO's OTP memory holds a fixed sensor-fusion algorithm in non-volatile storage, with no need for external EEPROM. Combined with a low-duty-cycle sleep loop, average current draw is sub-milliamps for multi-year battery life.
Recommended
Instrument Cluster Drivers
PIC16C62B-04E/SO drives automotive instrument clusters, gauge steppers, and warning LEDs. The PWM module controls backlight brightness and gauge pointer position via PWM-driven stepper drivers. The USART/SCI receives vehicle data from the body control module over a single-wire LIN interface, while the SSP port chains LED-driver chips for telltale indicators. The 22 I/O lines route switch inputs from stalks and steering-wheel buttons. Extended temperature grade and OTP memory make this an automotive-proven, cost-stable solution for high-volume cluster production.
Recommended
Consumer Remote Controls & IR Emitters
PIC16C62B-04E/SO can be used in universal remote controls and IR-based proximity sensors, leveraging its 22 I/O for keypad scanning, LED indicators, and IR emitter drive. The PWM module generates accurate 38kHz carrier for IR transmission protocols, and the ADC reads battery voltage and ambient-light levels. The 3.5KB OTP stores fixed command libraries for consumer TV/AV gear. Extended temperature grade supports outdoor and automotive cabin remotes.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62B-04E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62B-04/SO | PIC16C62BT-04E/SO | PIC16C622T-04E/SO | PIC16F72-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz (5 MIPS) |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP + 128B EEPROM | 3.5 KB Flash |
| RAM Size | 128 B | 128 B | 128 B | 128 B | 128 B |
| ADC | 10-bit, 8 ch | 10-bit, 8 ch | 10-bit, 8 ch | 10-bit, 8 ch | 8-bit, 5 ch |
| Operating Temperature | -40 to +125 C (Extended) | 0 to +70 C (Commercial) | -40 to +125 C (Extended) | -40 to +125 C (Extended) | -40 to +85 C (Industrial) |
| Memory Type | OTP EPROM (one-time) | OTP EPROM (one-time) | OTP EPROM (one-time) | OTP EPROM + on-chip EEPROM | Flash (reprogrammable) |
| Lifecycle Status | NRND (Microchip) | NRND | NRND | NRND | Active |
Key Differentiators
- Extended automotive temperature grade on the OTP die (vs PIC16C62B-04/SO)
- On-chip 10-bit ADC with 8 channels (vs PIC16F72-I/SO (flash successor))
- On-chip EEPROM option in the PIC16C622 sibling (vs PIC16C622T-04E/SO)
- Cost-optimized for sealed high-volume production (vs PIC16F72-I/SO (flash, ~2x cost))
Design Notes
PIC16C62B-04E/SO is OTP (One-Time Programmable) and cannot be erased or rewritten. Every engineering prototype run is destructive - if the firmware has a bug, you discard the part and start with a fresh device. Plan to develop and debug your firmware on a flash-based PIC16F72 or PIC16F88 development board first, then transfer the validated hex image to the OTP production part only after full verification. Budget for a one-time programming cost and a programmer that supports the PIC16C6x OTP windowless devices (e.g., Microchip MPLAB PM3 or PICkit 3 with OTP adapter).
Decouple the VDD/VSS pins with a 100nF ceramic capacitor placed as close to the package as possible (within 3mm), plus a bulk 10uF tantalum or aluminum on the same rail. The PIC16C62B draws transient currents during oscillator startup and EEPROM/flash write cycles (although this OTP part has no write cycle on the die); adequate decoupling prevents the brown-out reset from mis-triggering on cold-start. For battery-powered designs, place the MCU in SLEEP mode between ADC conversions and use the watchdog interrupt to wake periodically.
Place the 4MHz crystal or ceramic resonator within 5mm of the OSC1/OSC2 pins with the load capacitors tied directly to ground. Keep digital switching traces (PWM, relay drive) at least 5mm away from the crystal traces to avoid pulling the oscillator. For the ADC, route analog input traces separately from digital I/O and add a small RC filter (1k + 100nF) at each ANx pin to suppress high-frequency noise that would otherwise fold back into the 10-bit conversion.
The PIC16C62B-04E/SO is rated for -40C to +125C junction operation, but the actual junction-to-ambient thermal resistance (theta_JA) of the 28-SOIC package is approximately 80 C/W. At maximum supply voltage (6.0V) and active CPU at 4MHz, internal dissipation is on the order of 15mW, so self-heating is negligible. In sealed automotive enclosures with limited airflow, derate the ambient temperature budget by 10-15C to account for enclosure solar gain.
Compliance Information
RoHS compliant per Microchip product page and DigiKey listing. The -E temperature grade (-40C to +125C) targets automotive but the part itself is not formally AEC-Q100 qualified; for AEC-Q100 requirements, qualify the PIC16F72-I/SO or similar -Q1 part instead.
